Well said foggyroad. You covered most of my thoughts regarding uses. But I'll add a few.
I bought mine Monday afternoon of this week. It's Saturday morning now. I was not up at 4 am. lol. I had slept in a hotel all week so my own bed was comfy enough to pull the covers up a bit more snuggly at 4:30 am and snooze another 2 hours.
After a few days using the zero my other devices are idle. Like you foggy, I find the push to fill feature something I would not miss. I wonder if after a few refills if my sweet sauce won't tend to collect around the top area of the fill port and allow a wee bit of seepage to occur. But in theory it seems like a great idea. Perhaps we'll see more of this type of thing. Especially in a top fill application where seep wouldn't potentially cause a contact issue or even a short circuit.
I find the first drag of the day to be awesome. The next several as well. Now maybe it's my taste buds get blunted, but it seems like without allowing the pod to rest a time the flavor gets a bit lacking. The way I got around that was to swap pods with another flavor at intervals of the day.
I tried blocking the larger of the two holes and found I had to 'suck' a lot harder to get a good drag. I also found that a tart juice tends to remain flavorful longer than a sweet juice. I prefer sweet juices. But swapping pods at intervals give my taste buds a new experience so the tart is a treat too.
No burnt taste at all. The tc works great. For my uses the pod lasts longer than a charge. A tank load in a 2ml TPD compliant Zenith lasts me a week. So I get through a day with the zero easily both liquid and charge. My wife will probably be closer to your results foggy.
Now as a quit smoking device I'll say this:
As a dual user if cigarettes are nearby I will smoke. I'm not ready to toss the coffin nails just yet. But when I'm not near the cigarettes I don't miss them at all while using the zero. The one thing I'm still getting used to is just how smooth it is. I'm a wattage person and the Zenith at 13.5 watts puts out more vapor per MTL drag than I inhale. The zero is more like a cigarette. Way more. So after using Zeniths a few months the zero still takes my brain a few drags to adapt to each day. I'm sure others results will vary.
On day two my wife still prefers her sub ohm device. But after using her zero a time each direct lung draw on her favorite big device causes her to cough like crazy. So she ends up going back to her zero.
Now for the time being I have devised a shirt pocket kit by using an empty cigarette pack.
I'll come up with something better.
But for now what is already familiar in my shirt pocket now contains a flash drive sized device and two spare pods instead of coffin nails and a lighter.
Maybe somebody at some point will devise something with a flip top closure to reveal their pod for easy access while having spare pods available. Afterall one is none and two is one, right?
The magnets hold the pod firm with a wee bit of play, yet that allows the pod to be easily removed versus an ultra tight fit. The filling system, although not absolutely, positively leak
proof is definitely better at keeping juice inside the tank during drastic temperature changes like inside to outside where many full sized devices tend to seep some into the air chamber. I am very often plagued with unspent juice in the air chamber by my full sized devices. That is narry an issue with my zero thusfar. Nor is seeping when I leave it on the dash board of my pickup in sunlight.
I think of the zero at this point like a near perfect weather day where instead of 72° outside with a 4mph breeze, 73° with a 6mph breeze would be better. So any qualms I may have with the zero would be nit-picky in nature. It does not take much water to float my boat as it were, so I'll just say this little dude gets it done for me.
Oh, and I tend to have issues with rhythm or speed with 5 click devices. What ever time between clicks the zero is set for allows even me to get it on or off first try, everytime. Same with adjusting the output 3 click feature.
I also wanted to note that even my 3ml 70/30 juice provides a satisfying experience. Now how a 70 percent vg will affect lifespan of the cooker will be revealed over time.